you can start with what you like right now!
like starting from your own hobby
if you are a person who has a high imagination then you can start by learning to make digital paintings so you can make digital art and you can promote and sell them
Yes - I have a client who makes small lamp holders and makes candles and sell them.
She does all by herself so she saves a lot of money and earns a lot of profit.
Giving you hobby a different touch is an amazing idea. Go for it.